Справочник Пользователя для Omega Vehicle Security 1500
Hardware
7-9
NetScan to PC Connection
(RS-232)
DB9 Male
Pin & Signal
Cable
Wiring
DB9 Female
Pin & Signal
2
RxD-
⇐
3
TxD-
3
TxD-
⇒
2
RxD-
5
GND
⇔
5
GND
7
RTS-
⇒
8
CTS-
8
CTS-
⇐
7
RTS-
NetScan Connection
(RS-422)
DB9 Male
Pin & Signal
Cable Wiring
1
RxD+
⇐
2
RxD-
⇐
3
TxD-
⇒
4
TxD+
⇒
5
GND
⇔
6
RTS+
⇒
7
RTS-
⇒
8
CTS-
⇐
9
CTS+
⇐
Serial Port Pin Connector Signals for RS-232/422 Applications
RxD- (Receive Data Negative) Input: This pin accepts serial data sent by an RS-232 or RS-422 device. The serial data
received is expected to match the word length, baud rate, stop bits, and parity configuration of the particular port. The signal is
low true.
received is expected to match the word length, baud rate, stop bits, and parity configuration of the particular port. The signal is
low true.
RxD+ (Receive Data Positive) Input: This pin accepts serial data sent by an RS-422 device only. The signal is high true.
TxD- (Transmit Data Negative) Output: This pin transmits serial data to an RS-232 or RS-422 device. The serial data
received is sent with the word length, baud rate, stop bits, and parity configured for the particular port. The signal is low true.
received is sent with the word length, baud rate, stop bits, and parity configured for the particular port. The signal is low true.
TxD+ (Transmit Data Positive) Output: This pin transmits serial data to an RS-422 device only. The signal is high true.
CTS- (Clear To Send Negative) Input: CTS- input is used as a hardware handshake line to prevent NetScan from transmitting
serial data to an RS-232 or RS-422 device when it is not able to accept it. When RTS/CTS handshaking is selected, NetScan
will not transmit data out TxD- while this signal is un-asserted (low). If XON/XOFF or no handshaking is selected, the CTS-
line is ignored when transmitting data. The signal is low true.
serial data to an RS-232 or RS-422 device when it is not able to accept it. When RTS/CTS handshaking is selected, NetScan
will not transmit data out TxD- while this signal is un-asserted (low). If XON/XOFF or no handshaking is selected, the CTS-
line is ignored when transmitting data. The signal is low true.
CTS+ (Clear To Send Positive) Input: CTS+ input is used as a hardware handshake line to prevent NetScan from transmitting
serial data to an RS-422 device when it is not able to accept it. The signal is high true.
serial data to an RS-422 device when it is not able to accept it. The signal is high true.
RTS- (Request To Send Negative) Output: RTS- output is used as a hardware handshake line to prevent an RS-232 or RS-422
device from transmitting serial data to NetScan when it is not able to accept it. When automatic RTS/CTS handshaking is
selected, NetScan will assert (high) the RTS- signal when greater than 4096 memory locations are available in its internal
buffers. If available memory drops below 4096 bytes, NetScan unasserts (low) the RTS- signal. The signal is low true.
device from transmitting serial data to NetScan when it is not able to accept it. When automatic RTS/CTS handshaking is
selected, NetScan will assert (high) the RTS- signal when greater than 4096 memory locations are available in its internal
buffers. If available memory drops below 4096 bytes, NetScan unasserts (low) the RTS- signal. The signal is low true.
RTS+ (Request To Send Positive) Output: RTS+ output is used as a hardware handshake line for an RS-422 device. The
signal is high true.
signal is high true.
GND (Ground):
This signal sets the ground reference point for the other RS-232/RS-422 input and output signals.